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<br />Al Return flow Ylml8 Mesa OUtlet Drain BI 4820 * <br />Al Return flow protective and regulatory pumping unit CI 20 * <br />AZ Estimated unmeasured groundwater return flow 01 2915 <br />AZ Return flow share of Gi la Main Canal loss EI 3554 * <br />AZ Subtotal return flow EI 24486 24485 check from above <br />AZ Conslll'ptive Use (see note above) 7786 7787 check from above <br />AZ (A) Total for the North Gila Valley, The Yuma Irrigation and the Yuma Mesa Irrigation and Drainage Districts, and IUnit BI. <br />Al (B) Estimated at 85 percent of the Yuma Mesa Outlet Drain with baLance credited to 'Unit B'. <br />Al (C) Estimated at 85 percent of Protective and ReguLatory PlII'ping Unit with balance credited to 'Unit Bla <br />AZ (D) Estimated at 38 percent of the North GiLa VaLLey Diversion at Imperial Dam pLus 14 percent of Yuma Irrigation District diversion at <br />AZ Imperial Dam. (Based on analysis of the USGS Report 83-4ZZD entitled 'A Method for Estimating Ground-Water Return Flow to the <br />AZ Lower Colorado River in the Yuma Areal) <br />AZ (E) Diversion*miLage weighted share of Gila Main CanaL Loss less canaL surface evaporation (1397 af/yr) and prheotophytes (2154 af/yr). <br />AZ (F) AdditionaL unmeasured amounts of return fLows from the Yuma Mesa Irrigation and Drainage District, IUnit BI, the Cocopah Indian <br />AZ Reservation, and the Yuma County Water Users Association (YCWUA) are utiLized to meet conslll'ptive uses in the United States and in <br />AZ partiaL satisfaction of the Mexican Treaty obligationa Some of thes underground flows are recovered by pumping from wells on the <br />AZ Cocopah Indian Reservation and in the YCWUA area, and by some of the surface drains in the YCWUA area. Efforts will be made to at Least <br />AZ quantify these return fLows within broad limits by respective water user entities in future years. <br />AZ 81 Diversion adjusted for delivery to Mohave Valley I. D. D. (Chesney). <br /> <br />c::- <br />O <br />~ <br />GO <br />:1-" <br />',,..;I;. <br /> <br />. <br /> <br />. <br />